Steam-gage



. 1. ALLEN.

Steam Pressure Gage.'

Patented Aug. 14, 1860.

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UNITE SATES PANT OFFIC.

ALBERT J. ALLEN, OF BUFFALO, NEVI YORK, ASSIGNOR 'IO R. ALLEN, OF ROOK STREAM, NEW' YORK.

STEAM-GAGE.

Specification of Letters Patent No. 29,646, dated August 14, 1860.

To all 'whom t may concern.'

Be it known that I, ALBERT J. ALLEN, of the city of Buffalo, county of Erie. and State of New York, have invented certain new and useful Improvements in Steam-Gages; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings and the letters of reference marked thereon, in which- Figure I, is a front elevation with the top ring, glass, and parts of the dial removed. Fig. II is a transverse section.

Letters of like name and kind refer 'to like parts in each of the figures.

This invention consists in a certain arrangement and combination of parts and machinery by which the pressure in any steam boiler or other vessel maybe accurately determined if the steam or other fluid from such boiler or vessel be properly applied to my said improvement.

A represents a steam gage lcase 0f the ordinary construction, being of metal of a cylindrical shape with one end closed and the other open. It has also a flange (S) on the outside at its .closed end. The cylinder is about 2 inches deep and has a screw cut on the outside at the open end on which is screwed a ring (O) Fig. II, which serves the purpose of holding in place the glass plate (P) which glass plate serves the purpose of protecting the dial plate Q and index pointer (R) from damage and at Ythe same time allows them to be seen through its transparency. It also serves to 'keep out dust from the working parts.

(B) is a pipe screwed into one side or bottom of the case A and having a screw cut on its outer end for the purpose of uniting the gage with any steam boiler or other vessel by suitable pipes and unions. It also has a screw cut in its inside at the inner end into which is screwed capsule (C).

(C) is a capsule of metal permanently elastic and of such a kind as will not oxidize injuriously when in contact with steam 0r water. I use themetal melodeon ends are made of, preferring that for its easy elasticity. The construction is clearly shown in Fig. II. After having prepared the plates (t, 27,) of the proper thickness I secure the pipe (c) having a hole through it longitudinally and a screw cut on one of its ends to tit into pipe (B) the other end having a short round shank which is passed through the plate (t) at right angles and secured in its place by riveting and soldering them putting the ring between (t and 25) secure the whole together by rivets (r, 1', 13) making the whole steam and water tight except the hole (af) through pipe (c) through which the steam or water is to enter to operate the gage, the whole being securely screwed into pipe (B) by pipe (c).

(D) is a fulcrum block extending over capsule (C) and has a slot through it longitudinally in which is embraced lever It also has a small notch (y) carefully dressed out and case hardened or it may be inlaid with steel. In this notch is placed fulcrum pin (c) the block being secured to the case (A) by screws (f,

E is a crooked lever of metal having a fulcrum pin (c) of hardened steel projecting from either' side and resting in the notches (y-1/,) in fulcrum block It also has a shoulder (a) bearing on the center of capsule (C) and a tail piece (L) extending beyond fulcrum pin (c) with a point (0) bearing on spring (F) also a long end extending up and taking hold of rod I.

F is a spring of steel or other suitable metal secured to case (A) by screw (e) vand extends forward and presses against the point (o) of lever holding lever E firmly in fulcrum and making a counteracting force to that of the capsule (C) holding the lever firmly in place and preventing all jar or shaking thereof.

G is a stop secured to case (A) and having a slot in its end embracing lever (E) and preventing it from bearing on capsule (C) when not in use.

I-I is a framework carrying' segment (J) and pinion (K) and needs no description.

I is a rod connecting segment (J) and lever (E) and is held in place by pins s, s.

Q is a dial plate of the usual kind and needs no description beyond that shown in the drawing.

J is a segment of metal of the ordinary kind having small teeth or cogs on its periphery meshing in with pinion (K). It has a slot or jaw in its short end in which is secured the rod I by the pin (s).

K is a small pinion of steel having teeth meshing' into the teeth of segment (J The upper end of the inion K has a long shank eXtending througi dial plate (Q) and on which is secured pointer (R).

S is a coiled spring of the kind usually used in clocks or Watches and is secured to the lower end of pinion (K) by its inner end and the outer end is secured to post V attached to the frame (H).

Having described all the parts of my improved gage I Will now describe its mode of operation. rlhe first thing to be done is to secure the gage by its flange S in some con venient place near or attached to the steam boiler or other vessel and connect it to such boiler o-r vessel by means of a suitable pipe leading from the boiler or other vessel and uniting With the pipe Having thus connected the gage With the boiler or other vessel the steam being generated Hows through the pipe and enters the capsule (C) which being very thin readily expands or bulges out at the sides and being coniined to the pipe (B) can only expand upward pressing against the shoulder (a) on the lever (E) and lever (E) being conined in its place by ulcrum pin (e) the long end of the lever is moved in a segment of a circle having its center at (e) and carrying with it the rod I and segment (J) which turns pinion K around and with it index pointer (R) and thus indicates on the dial properly graduated the pressure per square inch in said boiler or other vessel the spring (F) bearing against the point (0) of lever holds the fulcrum pin (e) firmly in the notch at all times and serves as a counter force to the movement of capsule (C) and enables me to indicate upon the dial plate a higher degree of pressure Within the circle of the dial than Would otherwise be obtained and by its action pressing against lever oppositely to the capsule and thereby holding the lever steady and at all times preventing any vibration of the index pointer Whether upon a locomotive engine or in any other place When the gage is subject to violent motion. It also serve to return the lever and all the other parts to their places when the steam is Withdrawn and prevents any hitching or rough movement in the segment and pinion by reason of the strain of spring (S) and admitting a stronger spring (S) to be used than ordinary. Coiled spring (S) serves the purpose of counteracting the excess of pressure in capsule (C) and to take up all lost motion in the segment and pinion and all other joints in the machinery. It also by holding the pinion teeth firmly against the teeth in segment (J) prevents the pointer (R) from tumbling by any shaking or jarring motion of the gage and also serves to return all to place as the pressure is Withdrawn.

Having novv fully described the construction and operation of my improvements, What I claim as my invent-ion, and desire to secure by Letters Patent, is-

l. The combination of lever with capsule (C) the said lever being so constructed and arranged as to have a bearing upon the capsule upon one side of its fulcrum (c) and a bearing upon a spring upon the other side of its fulorum for the purposes and substantially as described.

2. The combination and arrangement of spring (F) With lever (E) and capsule (C) substantially as set '.torth.

3. The combination and arrangement of lever fulcrum block (D) capsule (C) spring (F) and stop substantially as shown and described.

ALBERT J. ALLEN.

In presence ot'- A. Gr. STEVENS, E. B. FORBUSH. 

